Hey guys,you probably already know, but in the R32 GTS-t, just to the left of the steering wheel, on the dash(/whatever you call that part) there are 2 buttons for the standard radio...My question is: Can these buttons be hooked up so that i can change the volume (for example) on an aftermarket stereo?If not, can they be hooked up for other things?Any help/advise here would be great.... cheers,Dave.